# Multi-stage Dockerfile for Astro/Starlight docs
# Supports both dev (hot-reload) and prod (static) modes

# =============================================================================
# Stage 1: Base with Node.js
# =============================================================================
FROM node:22-slim AS base
WORKDIR /app

# Disable Astro telemetry
ENV ASTRO_TELEMETRY_DISABLED=1

# =============================================================================
# Stage 2: Install dependencies
# =============================================================================
FROM base AS deps
COPY package.json package-lock.json* ./
RUN npm ci

# =============================================================================
# Stage 3: Development server (hot-reload)
# =============================================================================
FROM base AS dev
COPY --from=deps /app/node_modules ./node_modules
COPY . .

# Expose Vite dev server port
EXPOSE 4321

# Dev server with host binding for container access
CMD ["npm", "run", "dev", "--", "--host", "0.0.0.0"]

# =============================================================================
# Stage 4: Build static site
# =============================================================================
FROM base AS builder
COPY --from=deps /app/node_modules ./node_modules
COPY . .
RUN npm run build

# =============================================================================
# Stage 5: Production with Caddy
# =============================================================================
FROM caddy:2-alpine AS prod

# Copy built static files
COPY --from=builder /app/dist /srv

# Simple Caddyfile for static file serving
# (caddy-docker-proxy handles TLS and reverse proxy externally)
COPY <<EOF /etc/caddy/Caddyfile
:80 {
    root * /srv
    file_server
    try_files {path} {path}/ /index.html
    encode gzip

    # Cache static assets
    @static path *.js *.css *.woff2 *.png *.svg *.jpg *.ico
    header @static Cache-Control "public, max-age=31536000, immutable"

    # Don't cache HTML
    @html path *.html /
    header @html Cache-Control "no-cache, no-store, must-revalidate"
}
EOF

EXPOSE 80